Naphtha gasifier or vaporizer



Sept. 11, 1934. v. coLoMBo ET AL NAPHTHA GASIFIER OR VAPORIZER Filed May 2, 1934 v INVENTORS VIN C ENZO COLOMBO GINO OLIVARI wamm i ATTORNEYS Patented Sept. 11, 1934 NAPHTHA GASIFIER R VAPORIZER Vincenzo Colombo and Gino Olivari, Milan, Italy,

assignors Anonima, Rome, Italy to Gassificatore Lampo Societ.

Application May 2, 1934, Serial No. 723,442 In Italy May 17, 1933 1 Claim.

This invention relates to naphtha Vaporizers or gasifiers as used for internal combustion engines and of the kind which allows the engine to be started on a light fuel and afterwards to work with a heavier fuel.

With a View to increasing the heating surface, the vaporizing chamber is, in the case of known naphthavaporizers, usually made in the shape of a labyrinth, but that arrangement involves considerable pressure losses.

The present invention provides a naphtha vaporizer which avoids these pressure losses because it uses a vaporizing chamber which is essentially rectilinear and because the consequently diminished surface is increased by corrugating the walls of the vaporizing chamber.

A further improvement in the heating of the vaporizer is attained, according to the present invention, because the pipe for conveying away the hot exhaust gases is combined in a single block with the vaporizing chamber and with the induction chamber; the effect of the heat thus accumulated, is that the starting up of the engine on gasoline expedited and, moreover, the naphtha in its turn is more fully utilized.

One form of construction of the vaporizer according to the present invention, is shown by way of example upon the annexed drawing, in

which:

Fig. 1 is a longitudinal section of the vaporizer,

Fig. 2 is a sectional plan, and Fig. 3 is a crosssection on the line III-III of Fig. 2.

Referring to Fig. 1, provision is made at the inlet for a three-way cock, by the aid of which the engine can be started up on gasoline and after the engine has once been started, the fuel-feed is changed over to naphtha.

In the first stage, the valve 2 remains open and the valve 1 is closed (dotted line position). A

* combustible mixture of gasoline and air is in this case supplied through a jet or nozzle (notshown) at 12 and passes by the valve 2 into the suction or induction chamber 3. After having been heated in this chamber 3, the mixture passes through the induction pipes 4 and 5 directly into the corresponding engine-cylinder, the compressed charge being thereafter exploded in the usual way.

In a second working stage, the valve 2is closed and the valve 1 is opened by the actuation of a lever (not shown) whereby the supply of gasoline is shut off and at the same time a passage is afforded for the mixture of naphtha and air coming from a mixing jet or nozzle located at 11.

. This mixture is, however, thoroughly vaporized in the vaporizing chamber 6 which is itself heated externally by the exhaust gases in the outer 6, 3 and 9 in a single heat-accumulating block.

The induction pipes 4 and 5 are connected directly to the cylinder block. The exhaust gases from the engine enter the outer chamber or casing 9 at 13 and after heating the corrugated chamber 6 located inside the outer chamber 9, escape at The outer casing or chamber 9 is provided with a removable lid or cover which is not shown in Figure 1, and the end of the chamber 9 is provided with the detachable cover plate 15.

The

end walls of the suction chamber 3 as seen in Figure 1, are connected by webs 16 to the corrugated lower wall of What we claim is:

the vaporizing chamber 6.

A naphtha vaporizer for an internal combustion engine, comprising in a single block an outer casing, means for passing exhaust gases from the engine into and from said casing, a rectilinear vaporizing chamber located inside said outer casing, said vaporizing chamber having corrugated walls, a suction chamber also arranged inside said outer casing and between said outer casing and the corrugated wall of the said vaporizing chamber, said suction chamber communieating with the inner ends of induction pipes.

vaporizing chamber.

VINCENZO COLOMBO. GINO OLIVARI. 

